Matter and Antimatter

Matter and Antimatter

1. Hadrons

   • Baryons
     • Interact - Strong and EM
     • Decay - weak
     • Have 3 quarks
     • E.g. Protons, antiprotons, neutrons, antineutrons
       • Protons: u,u,d
       • Antiproton: u,u,d (all anti)
       • Neutron: d,d,u
       • Antineutron: d,d,u (all anti)
   • Mesons
     • Interact - strong and EM
     • Have 2 Quarks
     • E.g. Kaon and Pion
       • Kaon:
         • K-: u (anti), strange
         • K+: u, strange (anti)
         • K0: d, s (anti)
       • Pion:
         • pi 0: u,u (anti)
         • pi+: u, d (anti)
         • pi-: u (anti), down
     • Decay - weak

2. Leptons

   • E.g. positron, muon, antimuon, tau, antitau, neutrino, antineutrino
   • Interact - Weak and EM